7151618809 has 2 divisors, whose sum is σ = 7151618810. Its totient is φ = 7151618808.

The previous prime is 7151618783. The next prime is 7151618839. The reversal of 7151618809 is 9088161517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4713234409 + 2438384400 = 68653^2 + 49380^2 .

It is an emirp because it is prime and its reverse (9088161517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7151618809 - 2¹³ = 7151610617 is a prime.

It is a super-2 number, since 2×7151618809² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7151618839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3575809404 + 3575809405.

It is an arithmetic number, because the mean of its divisors is an integer number (3575809405).

Almost surely, 2^7151618809 is an apocalyptic number.

It is an amenable number.

7151618809 is a deficient number, since it is larger than the sum of its proper divisors (1).

7151618809 is an equidigital number, since it uses as much as digits as its factorization.

7151618809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 46.

The square root of 7151618809 is about 84567.2443029806. The cubic root of 7151618809 is about 1926.6439038024.

The spelling of 7151618809 in words is "seven billion, one hundred fifty-one million, six hundred eighteen thousand, eight hundred nine".